Townsend faces his old club tonight.
He said, "It was incredible.
"I was devastated at the time that the club did get relegated because for myself as a flair winger who liked to take players on and excite the crowd, it was absolute perfection for me.
"They absolutely loved me, but unfortunately they got relegated and I did so well that I felt I had to stay in the Premier League and made the decision to leave.
"It's a massive club - the fanbase, the city, the fact the stadium is in the city centre just adds to it.
"It's a great club, and hopefully they can get back to where they were before."